What is the heart of polymorphism in c#?

The core essence of polymorphism in C# is allowing different objects to respond to the same message or method call in different ways. This means that methods defined in a base class or interface can be redefined by derived or implementing classes, enabling the dynamic calling of different method implementations based on the specific type of object at runtime. This enhances the flexibility and scalability of code, making it easier for programs to adapt to changes and add new features. Polymorphism is an important concept in object-oriented programming and can be achieved through mechanisms such as inheritance, interfaces, and virtual methods.